I was exclaiming over the radio at the weekly church sale - just what I had been looking for - a small plug in radio with FM and no digital clock (fed up with having to go around and adjust all the clocks when the power hiccups) so did not immediately notice this splendid phone. Then I did.
This was still attached underneath (oh, I enjoy such 'history'). So the warranty expired on April 15 1987; warranties usually being for a five year period back then it means the phone was purchased in 1982 which coincides with what a Google search came up with - that these phones were made in the 80's.
At a church sale this morning this dachshund presented. We had one just like it on our desk back in the Fifties.
The sponge that was in its head and would have served to lick stamps is now mostly powder.
It goes well with the phone.